Agathe Larcher-Goscha, "Prince Cuong De and the Franco-Vietnamese competition for the heritage of Gia Long" in Viêt Nam exposé: French scholarship on twentieth-century Vietnamese society ed. Gisèle Luce Bousquet, Pierre Brocheux (Ann Arbor: University of Michigan Press, 2002. ISBN 0472068059) pp. 187-215 (Paginae selectae apud Google Books)
David Marr, Vietnamese Anticolonialism 1885–1925. Berkeley: University of California Press, 1971.